#!/usr/bin/perl

# Drakwizard
# Copyright (C) 2002,2003 Mandrakesoft
#
# Authors: Arnaud Desmons <adesmons@mandrakesoft.com>
#          Florent Villard <warly@mandrakesoft.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

package MDK::Wizard::Samba;
use strict;

use common;
use services;
use MDK::Wizard::Wizcommon;

my $wiz = new MDK::Wizard::Wizcommon;
my $old;

my $o = { 
    name => N("Samba wizard"),
	var => { 
	    wiz_box_list => '', 
	    wiz_hosts_allow => '', 
	    wiz_do_file_sharing => '',
	    wiz_all_printers => '',
	    wiz_level => '',
	    wiz_printers => '',
	    wiz_do_printer_sharing => '',
	    wiz_do_homes => '',
	    wiz_workgroup => '',
	    wiz_dir => '',
	    wiz_banner => '',
	    wiz_write_list => '',
	    wiz_read_list => '',
	    wiz_hosts_deny => '',
	    list_printers => ''
	},
	needed_rpm => [ 'samba-server' ],
	defaultimage => "/usr/share/wizards/samba_wizard/images/samba.png",
	init => sub {
	    my $file = "/etc/samba/smb.conf";
	    if (-f $file) {
		$old = read_conf($file);
	    } else {
		return (0, N("%s does not exist.", $file))
	    }
	}
};

my %level = (
    1 => N("All - No access restriction"),
    2 => N("My rules - Ask me allowed and denied hosts")
);

$o->{pages} = { 
    welcome => {
        name => N("Samba Configuration Wizard") . "\n\n" . N("Samba allows your server to behave as a file and print server for workstations running non-Linux systems.") . "\n\n" . N("This wizard will help you configuring the Samba services of your server."),
        no_back => 1,
        next => 'ask_workgroup'
    },
    ask_workgroup => {
        name => N("Workgroup") . "\n\n" . N("Samba needs to know the Windows Workgroup it will serve."),
        pre => sub {
           $o->{var}{wiz_workgroup} ||= get_workgroup()
        },
        data => [
           { label => N("Workgroup:"),  val => \$o->{var}{wiz_workgroup} },
        ],
	post => \&check_workgroup,
        next => 'ask_banner'
   },
   error_in_workgroup => {
       name => N("Error.") . "\n\n" . N("The Workgroup is wrong"),
       post => \&check_workgroup,
       next => 'ask_workgroup'
    },
    ask_banner => {
        name => N("Server Banner.") . "\n\n" . N("The banner is the way this server will be described in the Windows workstations."),
        pre => sub {
  	    $o->{var}{wiz_banner} ||= get_banner()
	},
	post => \&check_banner,
        data => [
            { label => N("Banner:"),  val => \$o->{var}{wiz_banner} },
            ],
        next => 'ask_net'
    },
    error_in_banner => {
        name => N("Error.") . "\n\n" . N("The Server Banner is incorrect"),
	ignore => 1,
        next => 'ask_banner'
    },
    ask_net => {
        name => N("Access control") . "\n\n" . "\n\n",
        pre => sub {
      	$o->{var}{wiz_level} ||= defined $old->{conf}{global}{'hosts allow'} ? 2 : 1
        },
        post => sub { return 'ask_netmask' if $o->{var}{wiz_level} == 2 },
        data => [
            { label => N("Access level :"), val => \$o->{var}{wiz_level}, list => [ keys %level ], format => sub { $level{$_[0]} } },
            ],
        next => 'ask_services'
    },
    ask_netmask => {
        name => N("Access control") . "\n\n" . N("* Example 1: allow all IPs in 150.203.*.*; except one\nhosts allow = 150.203. EXCEPT 150.203.6.66") . "\n\n" . N("* Example 2: allow hosts that match the given network/netmask\nhosts allow = 150.203.15.0/255.255.255.0") . "\n\n" . N("* Example 3: allow a couple of hosts\nhosts allow = lapland, arvidsjaur") . "\n\n" . N("* Example 4: allow only hosts in NIS netgroup \"foonet\",  but deny access from one particular host\nhosts allow = \@foonet\nhosts deny = pirate") . "\n\n" . N("Note that access still requires suitable user-level passwords."),
        pre => sub {
      	$o->{var}{wiz_hosts_allow} ||= get_allow_host();
      	$o->{var}{wiz_hosts_deny} ||= get_deny_host()
        },
        post => \&check,
        data => [
            { label => N("Allow hosts:"),  val => \$o->{var}{wiz_hosts_allow} },
            { label => N("Deny hosts:"),  val => \$o->{var}{wiz_hosts_deny} },
            ],
        next => 'ask_services'
    },
    ask_services => {
        name => N("Enabled Samba Services") . "\n\n" . N("Samba can provide a common file sharing area to your Windows workstation, and can also provide printer sharing for the printers connected to your server."),
        pre => sub {
      	$o->{var}{wiz_do_file_sharing} ||= get_file_sharing();
      	$o->{var}{wiz_do_printer_sharing} ||= 1;
      	$o->{var}{wiz_do_homes} ||= get_home_sharing()
        },
        post => \&check_services,
        data => [
            { text => N("Enable file sharing area"), type => 'bool', val => \$o->{var}{wiz_do_file_sharing} },
            { text => N("Enable Server Printer Sharing"), type => 'bool', val => \$o->{var}{wiz_do_printer_sharing} },
            { text => N("Make home directories available for their owners"), type => 'bool', val => \$o->{var}{wiz_do_homes} },
            ],
        next => 'ask_dir'
    },
    warn_smbpasswd => {
        name => N("Warning.") . "\n\n" . N("You have selected to allow user access their home directories via samba but you/they must use smbpasswd to set a password."),
        post => \&ask_dir,
	ignore => 1,
        next => 'summary'
    },
    ask_dir => {
        name => N("Shared directory:") . "\n\n" . N("Type the path of the directory you want being shared."),
        pre => sub {
      	    $o->{var}{wiz_dir} ||= get_dir()
        },
        post => \&check_dir,
        data => [
            { label => N("Shared directory:"),  val => \$o->{var}{wiz_dir} },
            ],
        next => 'ask_access'
    },
    error_in_dir => {
        name => N("Error.") . "\n\n" . N("The path you entered does not exist."),
	ignore => 1,
        next => 'ask_dir'
    },
    ask_access => {
        name => N("File permissions") . "\n\n" . N("Type users or group separated by a comma (groups must be preceded by a '\@') like this :\nroot, fred, \@users, \@wheel for each kind of permission.") . "\n\n",
        pre => sub {
      	$o->{var}{wiz_read_list} ||= get_read();
      	$o->{var}{wiz_write_list} ||= get_write()
        },
        post => \&check_users,
        data => [
            { label => N("read list:"), help => N("root, fred, \@users, \@wheel"), val => \$o->{var}{wiz_read_list} },
            { label => N("write list:"), help => N("root, fred, \@users, \@wheel"), val => \$o->{var}{wiz_write_list} },
            ],
        next => 'ask_printers'
    },
    ask_printers => {
        name => N("Select which printers you want to be accessible from known users"),
        pre => sub {
      	    $o->{var}{list_printers} ||=  [ list_printers() ];
	    $o->{var}{wiz_box_list} ||= get_previous_printers($o->{var}{list_printers})
        },
        post => \&check,
        data => [
            { text => N("Enable all printers"), type => 'bool', val => \$o->{var}{wiz_all_printers} },
            { val => \$o->{var}{wiz_box_list}, boolean_list => \$o->{var}{list_printers}, disabled => sub { $o->{var}{wiz_all_printers} and return 1; 0 } },
            ],
        next => 'summary'
    },
    warning => {
      name => N("Warning."),
      data => [ { label => '' } ],
      ignore => 1,
      next => 'summary'
    },
    error => {
      name => N("Error."),
      data => [ { label => '' } ],
      ignore => 1,
      next => 'config'
    },
    summary => {
      name =>  N("Configuring Samba") . "\n\n" . N("The wizard collected the following parameters
configure Samba.") . "\n\n" . N("To accept these values, and configure your server, click the Next button or use the Back button to correct them."),
      pre => sub {
          $o->{var}{printers} = get_printers();
	  $o->{var}{file_sharing} = $o->{var}{wiz_do_file_sharing} ? N("enabled") : N("disabled");
	  $o->{var}{printer_sharing} = $o->{var}{wiz_do_printer_sharing} ? N("enabled") : N("disabled");
	  $o->{var}{shared_homes} = $o->{var}{wiz_do_homes} ? N("enabled") : N("disabled")
      },	    
      data => [
            { label => N("Workgroup:"), fixed_val => \$o->{var}{wiz_workgroup} },
            { label => N("Server Banner:"), fixed_val => \$o->{var}{wiz_banner} },
            { label => N("File Sharing:"),  fixed_val => \$o->{var}{file_sharing} },
            { label => N("Shared directory:"),  fixed_val => \$o->{var}{wiz_dir} },
            { label => N("Print Server:"),  fixed_val => \$o->{var}{printer_sharing} },
            { label => N("Home:"), fixed_val => \$o->{var}{shared_homes} },
            { label => N("Printers:"), fixed_val => \$o->{var}{printers} },
        ],
      post => \&do_it,
      next => 'end'
    },
    end => { 
      name => N("Congratulations") . "\n\n" . N("The wizard successfully configured your Samba server."), 
      end => 1,
      next => 0
    },
};

sub new {
    my ($class) = @_;
    bless {
	    o   => $o,
       }, $class;
}

sub check {
    $> and return 1;
    $wiz->{net}->is_dhcp and return 2;
    0;
}

sub check_services {
    $o->{var}{wiz_do_homes} and return 'warn_smbpasswd';
    $o->{var}{wiz_do_file_sharing} and return 'ask_dir';
    $o->{var}{wiz_do_printer_sharing} and return 'ask_printers';
}

sub check_dir {
    -d ($o->{var}{wiz_dir}) or return 'error_in_dir'
}

# the "__" before comment is to avoid conflicts with possible "comment" variable
# for variables value is in value key and comment idem (no risk of conflict)

sub read_conf {
    my $self = {};
    my ($file) = @_;
    my ($menu, @tab, %conf);

    local *FH;
    open(FH, $file) or die "$! ($file)";
    local $_;
    while (<FH>) {
	if (/^(\s*;?\s*)\[(.*)\]/) {
	    $menu = $2;
	    $conf{$menu}{__comment} = $1;
	    print "$menu COMMENT $1\n"; 
	}
	elsif (/^(?!#)(\s*;*\s*)(.*?)\s*=\s*(.*)\s*$/) {
	    $conf{$menu}{$2}{value} = $3;
	    $conf{$menu}{$2}{comment} = $1;
	    print "$menu $2 VALUE $3 COMMENT $1\n"; 
	}
	push @tab, $_;
    }
    $self->{conf} = \%conf;
    $self->{tab} = \@tab;
    bless $self;
}

# we parse @tab to check for values in the struct.

sub write_conf {
    my ($self, $file) = @_;
    my $menu;

    local *FH;
    open(FH, "> $file") or die "$!";
    foreach (@{$self->{tab}}) {
	if (/^\s*;?\s*\[(.*)\]/) {
	    $menu = $1;
	    print FH "$self->{conf}->{$menu}{__comment}\[$menu\]\n";
	}
	elsif (/^(?!#)\s*;*\s*(.*?)\s*=/) {
	    print FH "$self->{conf}->{$menu}{$1}{comment}$1 = $self->{conf}->{$menu}{$1}{value}\n";
	}
	else {
	    print FH $_;
	}
    }
}

#section has the name of the printer
sub add_printer {
    my ($self, $printer) = @_;

    if (exists $self->{conf}{$printer}) {
	$self->comment_menu($printer, " ");
    }
    else {
	$self->{conf}{$printer}{printable}{comment} = " ";
	$self->{conf}{$printer}{printer}{comment} = " ";
	push @{$self->{tab}}, "[$printer]\n";
	push @{$self->{tab}}, "printer = $printer\n"; 
	push @{$self->{tab}}, "printable = yes\n"; 
	$self->{conf}{$printer}{printer}{value} = $printer;
	$self->{conf}{$printer}{printable}{value} = "yes";
    }
}

sub list_printers {
    my @list if 0;

    return @list if @list;
    @list = sort grep { /^(?!#).+/ } map {
        split(':', $_)->[0];
    } cat_("/etc/printcap");
    if (@list) {
	@list
    } else {
	()
    }
}


sub check_users {
    return 'ask_printers' if $o->{var}{wiz_do_printer_sharing}
}

sub comment_menu {
    my ($self, $menu, $str) = @_;

    return if !$menu || !exists $self->{conf}{$menu};
    $self->{conf}{$menu}{__comment} = $str;
    foreach (keys %{$self->{conf}{$menu}}) {
	$_ eq "__comment" and next;
	$self->{conf}{$menu}{$_}{comment} = $str;
    }
}

sub comment_var {
    my ($self, $menu, $var, $str) = @_;

    $self->{conf}{$menu}{$var}{comment} = $str;
}

sub chg_var {
    my ($self, $menu, $var, $str) = @_;

    $self->{conf}{$menu}{$var}{value} = $str;
}

# all or selected printers
sub printer_sharing {
    my	$self = shift;

    if ($o->{var}{wiz_all_printers}) {
	$self->comment_menu('printers', " ");
    } else { 
	$self->comment_menu("printers", ";");
	for (my $i = 0; $i < @{$o->{var}{wiz_box_list}}; $i++) {
	    my $printer = $o->{var}{list_printers}[$i];
	    if ($o->{var}{wiz_box_list}[$i]) {
		$self->add_printer($printer);
	    } else {
		$self->comment_menu($printer, ";");
	    }
	}
    }
}

sub get_previous_printers {
    my ($list_printers) = @_;
    my $previous = [];
    foreach my $p (grep { defined $old->{conf}{$_}{printer} } keys %{$old->{conf}}) {
	my $test = any { /\Q$p/ } @$list_printers;
	push @$previous, $test
    }
    $previous
}

sub get_printers {
    if ($o->{var}{wiz_do_printer_sharing}) {
	my $string;
	$o->{var}{wiz_all_printers} and return "all printers";
	for (my $i = 0; $i < @{$o->{var}{wiz_box_list}}; $i++) {
	    $string .= "$o->{var}{list_printers}[$i]\n" if $o->{var}{wiz_box_list}[$i]
	}
	$string;
    }
    else {
	"disabled";
    }
}

sub check_workgroup {
    $o->{var}{wiz_workgroup} or return 'error_in_workgroup'
}

sub ask_acces {
    10;
}

sub get_write {
    $old->{conf}{public}{"write list"}{value};
}

sub get_read {
    $old->{conf}{public}{"read list"}{value};
}

sub check_banner {
    $o->{var}{wiz_banner} or return 'error_in_banner'
}

sub get_workgroup {
    $old->{conf}{global}{workgroup}{value}
}

sub get_banner {
    $old->{conf}{global}{"server string"}{value};
}

sub ask_dir {
    return 'ask_dir' if $o->{var}{wiz_do_file_sharing};
    return 'ask_printers' if $o->{var}{wiz_do_printer_sharing};
}

sub get_dir {
    $old->{conf}{public}{path}{value};
}

sub get_file_sharing {
    return 0 if $old->{conf}{public}{__comment} =~ /;|#/;
    1;
}

sub get_home_sharing {
    return 0 if $old->{conf}{homes}{__comment} =~ /;|#/;
    1;
}

sub get_netmask {
    "192.168.100.1/255.255.255.0";
}

sub get_allow_host {
    $old->{conf}{global}{"hosts allow"}{value};
}

sub get_deny_host {
    $old->{conf}{global}{"hosts deny"}{value};
}

# remember one variable cannot be commented and not in the same file.
sub do_it {
    $::testing and return;
    my	$file = "/usr/share/wizards//samba_wizard/scripts/smb.conf.default";

    my $conf = read_conf($file);
    $conf->chg_var("global", "workgroup", $o->{var}{wiz_workgroup});
    $conf->chg_var("global", "server string", $o->{var}{wiz_banner});
    $conf->chg_var("public", "write list", $o->{var}{wiz_write_list}) if $o->{var}{wiz_do_file_sharing};
    $conf->chg_var("public", "read list", $o->{var}{wiz_read_list}) if $o->{var}{wiz_do_file_sharing};
    #my $ip = $wiz->{net}->itf_get("IPADDR");
    if ($o->{var}{wiz_do_file_sharing}) {
	standalone->explanations("Enabling $o->{var}{wiz_dir} samba file sharing");
 	$conf->comment_menu("public", " ");
	$conf->chg_var("public", "path", $o->{var}{wiz_dir});
    }
    else {
	standalone->explanations("Disabling samba file sharing");
	$conf->comment_menu("public", ";");
    }
    if ($o->{var}{wiz_do_homes}) {
	standalone->explanations("Enabling samba homes sharing");
	$conf->comment_menu("homes", " ");
    }
    else {
	standalone->explanations("Disabling samba homes sharing");
	$conf->comment_menu("homes", ";");
    }
    standalone->explanations("Samba deny $o->{var}{wiz_hosts_deny}");
    standalone->explanations("Samba allow $o->{var}{wiz_hosts_allow}");
    $conf->chg_var("global", "hosts deny", $o->{var}{wiz_hosts_deny});
    $conf->chg_var("global", "hosts allow", $o->{var}{wiz_hosts_allow});

    if ($o->{var}{wiz_do_printer_sharing}) {
	standalone->explanations("Enabling printer sharing");
	$conf->printer_sharing;
    } else {
 	standalone->explanations("Disabling printer sharing");
 	for (my $i = 0; $i < @{$o->{var}{wiz_box_list}}; $i++) {
	    $conf->comment_menu($o->{var}{list_printers}[$i], ";");
 	}
	$conf->comment_menu("printers", ";");
     }
    $conf->write_conf("/etc/samba/smb.conf");
    if (services::is_service_running('smb')) {
	services::restart('smb') 
    } else {
        services::start('smb')
    }
}
1;